What is a break even calculator?

A break even calculator works out the exact sales volume, in units sold or gross sales revenue, needed to cover your total costs so your business makes zero profit and zero loss. Break-even units equal fixed costs divided by (price minus variable cost per unit). It compares your fixed overhead expenses against the contribution margin of each unit sold. Once you reach that break-even point, your overhead is fully paid off, and every additional sale generates net profit.

What is the difference between break-even and profit?

Break-even is the zero-profit milestone where sales revenue matches total business expenses, whereas profit is the surplus cash left over after passing that threshold. At the break-even point, your sales have covered all fixed overhead costs and variable production expenses without creating any net income or net loss. After reaching break-even, each extra unit sold contributes its unit profit directly to your bottom line.

How do you calculate the break-even point in units versus sales revenue?

To calculate the break-even point in units, divide total fixed costs by your unit contribution margin, while break-even in sales revenue divides total fixed costs by your contribution margin ratio. The unit formula shows how many physical products or billable hours you must sell: Break-Even Units = Fixed Costs / (Price per Unit - Variable Cost per Unit). The revenue formula shows the total dollar sales required: Break-Even Revenue = Fixed Costs / Contribution Margin Ratio. For example, $12,000 in overhead with a $30 margin per unit on a $48 product requires 400 units or $19,200 in gross sales revenue to break even.

What is contribution margin, and how do you calculate the contribution margin ratio?

Contribution margin is the dollar amount left from a product sale after deducting its direct variable costs, while the contribution margin ratio expresses that remainder as a percentage of the selling price. Unit contribution margin equals selling price minus variable cost per item (Price - Variable Cost). The contribution margin ratio equals contribution margin divided by selling price. For instance, if you sell an item for $50 and it costs $20 to make, your contribution margin is $30, giving a contribution margin ratio of 60% ($30 / $50). That means 60 cents of every sales dollar goes toward covering your fixed overhead until you break even.

What happens to your break-even point if selling price is less than or equal to variable cost?

If your selling price is less than or equal to variable cost per unit, your contribution margin becomes zero or negative, making it mathematically impossible to break even at any sales volume. Every item sold produces an immediate cash loss, which adds to your fixed overhead rather than paying it down. To establish a realistic break-even point, you must either raise prices, negotiate cheaper materials, or reduce unit labor and shipping costs.

How do you calculate your break-even point step by step without a calculator?

To calculate your break-even point manually, subtract your variable cost per unit from your selling price to find contribution margin, then divide total fixed costs by that contribution margin. If you sell physical products, round any fractional result up to the next whole unit (for instance, 342.2 units becomes 343 units) so your costs are fully covered. Next, multiply those required units by your selling price to determine your break-even sales revenue. If you have a specific profit target, add that dollar goal to fixed overhead before dividing: Target Units = (Fixed Costs + Target Profit) / Contribution Margin.

Should UK businesses include VAT when calculating their break-even point?

VAT-registered UK businesses should calculate their break-even point using net figures exclusive of VAT, because output VAT collected on sales belongs to HMRC and input VAT paid on allowable expenses is reclaimed. Including 20% VAT in your selling price creates an artificial surplus in your calculations, giving you an understated break-even target that leaves you short on real operating cash. If your business is not VAT-registered, treat VAT as an unrecoverable expense and include the full gross cost in your fixed and variable expense totals.

Why does a break-even calculator display both exact and rounded unit sales?

A break-even calculator shows rounded units because physical inventory cannot be sold in fractional pieces, but it keeps the exact decimal to help subscription and service businesses monitor precise run rates. When a break-even formula results in a decimal such as 412.3 units, selling 412 units leaves you slightly short of covering overhead, so Plaintools rounds up to 413 whole units. The exact decimal remains visible so digital agencies, freelancers, and software founders can model fractional monthly retainers or seat averages without distortion.

Break even calculator

See the exact unit count and sales revenue you need to cover overhead and hit break-even. Enter your fixed costs, unit variable cost, and selling price to find your break-even point, sales target, and contribution margin. Everything runs locally in your browser, so your business figures stay private.

Calculates client-side · Estimates only · Not financial advice

Presets:

Fixed Overhead Costs

Rent, insurance, salaries, software, loan interest (costs you pay even if you sell 0 units).

Variable Cost per Unit

Materials, wholesale cost, packaging, direct labor, payment fee per item sold.

Selling Price per Unit

The retail or invoice price you charge your customer for one unit.

Target Profit Goal (Optional)

Desired net profit above break-even. Leave blank or 0 to focus on zero-profit break-even.

Break-Even Results

Break-Even Units

400

400.00 exact units

Break-Even Sales Revenue

$19,200.00

Gross sales to cover costs

Unit Contribution Margin

$30.00

62.5% of price covers overhead

Target Profit Units

567

Sales needed: $27,200.00

What these numbers mean for your business

You make $30.00 on every unit you sell after paying its direct variable cost ($48.00 price − $18.00 variable cost).

To pay off your $12,000.00 in fixed overhead, you need to sell exactly 400 units (bringing in $19,200.00 in total sales).

To reach your target profit goal of $5,000.00, you need to sell 567 units (total sales of $27,200.00). Every unit sold beyond that adds $30.00 directly to your bottom-line profit.

Financial Cost & Volume Breakdown

Fixed Overhead Costs: $12,000.00
Selling Price per Unit: $48.00
Variable Cost per Unit: $18.00
Unit Contribution Margin: $30.00 (Selling Price − Variable Cost)
Contribution Margin Ratio: 62.50% of each dollar covers fixed costs
Break-Even Point (Units): 400 units (400.0000 exact)
Break-Even Sales Revenue: $19,200.00
Target Profit Goal: $5,000.00
Units Needed for Target: 567 units
Revenue for Target Profit: $27,200.00

Volume Sensitivity & Operating Income Projections

Volume Level	Units Sold	Total Revenue	Variable Costs	Total Costs	Net Income / (Loss)
0%	0	$0.00	$0.00	$12,000.00	-$12,000.00
25%	100	$4,800.00	$1,800.00	$13,800.00	-$9,000.00
50%	200	$9,600.00	$3,600.00	$15,600.00	-$6,000.00
75%	300	$14,400.00	$5,400.00	$17,400.00	-$3,000.00
100% (Break-Even)	400	$19,200.00	$7,200.00	$19,200.00	$0.00
125%	500	$24,000.00	$9,000.00	$21,000.00	$3,000.00
150%	600	$28,800.00	$10,800.00	$22,800.00	$6,000.00
200%	800	$38,400.00	$14,400.00	$26,400.00	$12,000.00

Financial Disclaimer:

This calculator provides mathematical estimates based on linear cost-volume-profit formulas. It does not constitute accounting, tax, or financial advisory. In real operations, fixed costs can jump at capacity thresholds (step-fixed costs), and variable unit costs often shift with volume pricing, shipping rates, and overtime labor.

Selling handmade or marketplace crafts? Use our Etsy fee calculator to factor in listing fees and payment processing, or estimate sales taxes with the GST/VAT calculator.